AS397990 Williamslabs LLC

WILLIAMSLABS-LLC - Williamslabs LLC · registered in the United States

IPv4 addresses5122 prefixes · <0.001% of announced IPv4

Rank in United States#10,290largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#47,850of 79,396 networks with IPv4

IPv616 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS397990 in ASN lookup Look up an IP in this network (23.144.112.1) All networks in United States

IPv4 prefixes

All 2 prefixes, in address order.

23.144.112.0/24
44.31.141.0/24

IPv6 prefixes

All 1 prefix.

2620:78:a000::/44

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IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources